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Posted to common-dev@hadoop.apache.org by "Ramya R (JIRA)" <ji...@apache.org> on 2009/03/17 07:00:50 UTC
[jira] Commented: (HADOOP-5513) Balancer throws
NullPointerException
[ https://issues.apache.org/jira/browse/HADOOP-5513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682566#action_12682566 ]
Ramya R commented on HADOOP-5513:
---------------------------------
Below is the output of bin/hadoop balancer
{noformat}
Balancing took x milliseconds
09/03/17 05:38:37 ERROR balancer.Balancer: java.lang.NullPointerException
at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:134)
at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:123)
at org.apache.hadoop.hdfs.server.datanode.DataNode.createSocketAddr(DataNode.java:152)
at org.apache.hadoop.hdfs.server.balancer.Balancer.createNamenode(Balancer.java:849)
at org.apache.hadoop.hdfs.server.balancer.Balancer.init(Balancer.java:840)
at org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:1418)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:791)
{noformat}
Also when balancer is run with invalid threshold value such as bin/hadoop balancer -threshold -1, it throws the usage message and also displays the time taken to balance. This is a regression. Only a usage message is expected.
{noformat}
Expect a double parameter in the range of [0, 100]: -1
Usage: java Balancer
[-threshold <threshold>] percentage of disk capacity
Balancing took x milliseconds
{noformat}
> Balancer throws NullPointerException
> ------------------------------------
>
> Key: HADOOP-5513
> URL: https://issues.apache.org/jira/browse/HADOOP-5513
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.20.0
> Reporter: Ramya R
> Priority: Minor
> Fix For: 0.20.0
>
>
> Balancer command seems to be throwing NullPointerException when run on 0.20 using fairshare scheduler
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